Re: [PATCH 1/5] ext4 online defrag header file changes

[Andreas Dilger <adilger@sun.com>]

On Mar 14, 2008  21:02 +0900, Akira Fujita wrote:
> How about renaming this structure from ext4_extent_data to
> ext4_extent_info which used the extent in-core structure
> and put it into ext4_fs_extents.h? 
> Because in-core super_block is ext4_sb_info.
> 
> /*
>  * This is the extent in-core structure.
>  */
> struct ext4_extent_info {
> 	ext4_lblk_t	ee_block;	/* first logical block extent covers */
> 	int		ee_len;		/* number of blocks covered by extent */
> 	ext4_fsblk_t	ee_start;	/* first physical block extent covers */
> };      

Would it be possible to use the FIEMAP interface to get the file mapping
data to userspace?  That would avoid the need to have a second ioctl
with nearly the same data.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.